Grinding-mill



(No Model.) 2 Sheets-Sheet .1.

J. T. OBENG'HAIN.

GRINDING MILL.

Patented Dec. 9, 1884.

MW V/////l/ Illnlll Witnesses a me. MW

Attornfey N. PETERS. Pnammhn n n r, wasmfl mn, D. c.

(No Model.) 2 Sheets-Sheet 2.,

J. T. OBENOHAIN. GRINDING MILL.

N0.308,976. Patented Dec. 9,1884.

Q a v Witnesses Inventor Wm M u 1,.

q M M Attorney ogmplwn Washington. 0. cv

N. PETERS, Phnlml lh UNITED STATES Parana rrrcu.

JOHN T. OBENGHAIN, or LOGANSPORT, INDIANA.

GRINDING-MILL.

SPECIFICATION forming part of Letters Patent No. 308,976, dated December 9, 1884-.

Applicationfiled April 17,1se4. (N0 model.)

To all whom it may concern:

Be it known that I, Joan T. OBENOIIAIN, of Logansport, Cass county, Indiana, have invented certain new and useful Improvements in Grinding-Mills, of which the following is a specification.

This invention relates to mills for grinding by means of a corrugated roll working in connection with a series of circulnferentiallyarranged rolls and grinding-shoes or rolls alone. It relates, especially, to mills for care outing the gradual-reduction process.

The object of the invention is to provide a mill which will perform the work of several mills of common construction, and at the same time execute the process of gradual reduction.

In Letters Patent No. 289,695, granted to me December 4:, 1883, for a grinding-mill,will be found set forth a mill of the class to which this present invention relates, and the. said Letters Patent are hereby referred to as serving to render unnecessary a description of many of the details of the present invention.

The present invention will be readily understood from thefollowing description, taken in connection with the accompanying drawings, in which Figure l is a plan of a grinding-mill embodying my improvement; Fig. 2, a side elevation of the same; Fig. 3, a section of the mill-case, showing the edge of a grindingshoe; Fig. l, a section of themill-case, showing the inner face of a grinding-shoe; and Fig. 5, a section of the mill-case, showing one of the outer rolls.

In the accompanying drawings, A, B, and U represent the disk-like mill-case; D, the corrugated roll journaled therein; E, a circumferential series of grindingshoes arranged around the roll D; F, supply-openings through the top of the case, leading to the interior of the grinding-shoes; G, the corrugated portion of a grinding-shoe; I, the adjusting devices for the grinding-shoes. The parts referred to are relatively arranged and fitted to operate substantially as set fort-h in my previous patent above referred to.

J represents a corrugated block bolted against the edge of each grinding-shoe; K, the tapering feed-channels in the grindingshoes, open at the top and faces L, a circumferential series of outer rolls arranged around the main roll 1); M, supply-openingsthrough the top of the mill-case at each of the outer rolls, coresponding in office with the openings Ffor the. grinding-shoes; N, gusset-like partitions reaching from the topto the bottom of the case, and restricting the flow of grain e11- tering the openings M to a direction suited to properly present it to the contiguous corrugated peripheries of the main and .outer rolls; 0, levers pivoted to thetop and bottom pieces of the mill-case,and carrying the bearings for the journals of the outer rolls; P, adj usting screws engaging the levers O, and serving to adjust the approach of the outer rolls to the main roll; Q, springs upon these adj Listing-screws, serving to urge the outer rolls toward the main roll; 1%,- independent outlet-spouts for the product of each shoe and outer roll; S, the driving-pulley of the main roll; T, driving-pulleys upon the lower ends of the shafts of the outer rolls; U, a pulley upon the shaft of the main roll for giving mo-- tion to thepulleys-of the series of outer rolls,

and V radial partitions reaching from theinner periphery of the mill-case to the periphery of the main roll, and serving to divide the millcase into separate departments for each of the grinding-shoes and outer rolls.

In my former patent above referred to the grinding-shoes had corrugated surfaces integrally formed upon them. In the present case these corrugated surfaces G are formed of blocks J, bolted to the edges of the shoes. These blocks are slotted, as shown in Fig. 3, whereby their appoach to the main roll may be adjusted independent of the adjustment of the shoes. The shoes being pivoted,it follows that the ordinary adjustment of grindingspace effects the position of the non-corrugated portion of the shoe which forms the rear wall of the feed-channel with reference to the periphery of the main roll.

As the corrugated portion of the grindingshoe tends in time to retreat, as the result of being worn and dressed, it follows that in time the wall referred to will not occupyits proper position with reference to the periphery of the main roll, and an undesirable opening at the rear of the feed-channel might result. The

40 upon the shaft of the main roll.

tion to the main roll, and the block is adjusted with reference to its shoe. I11 operating the to mill the adjusting devices I serve for effecting a working adjustment of the shoes with their blocks. The blocks upon the different shoes are, in the execution of the gradual-reduction process, to be corrugated with different de- 1 5 grees of fineness, after the manner of the shoe- 7 corrugations of my previous patent. These blocks are made of hardened steel, and they are J anus-faced, as shown, whereby they may be reversed when one side is worn. I have 2.) on occasions in practice formed these blocks of separate layers of sheet-stcel,one layer for each corrugation.

The outer rolls, L, are to be corrugated in the execution of the gradual-reduction process with different degrees of fineness, the lineness of all of the rolls and shoes to be so related to each other as to produce by consecutive steps the reduction desired. The outer rolls are inclosed within the mill-case, the

go same as'the shoes, and the screws I? serve to adjust their grinding distances by moving the pivoted levers which carry the roll-journals inward and outward. The gussetsN serve to direct the grain between the rolls in the same manner in which the channels K act forthe shoes. A single belt engaging the pulley U and all of the pulleys T may serve to give motion to the outer rolls; or each roll may be belted independently from separate pulleys The main roll and the outer rolls are to be driven at different peripheral rates of speed.

In the execution of the gradrial-reduction process the grain is fed into one of the shoes which is of such grade of corrugation and so adjusted as to accomplish the first reduction or split. The product of this operation passes out of the appropriate spout It, thence to the proper scparator,whcnce the split grain is elevated and fed to the second shoe in the series.-

a shoe having a grade'of corrugation and of adjustment adapted to effect a proper second step in the reducing operation. The material is then passed through the various shoes and intervening separators and finally to the first outer roll in the series, and so on until the material has been treated successively by each of the shoes and rolls.

By the combination of rolls and shoes I am enabled to perform the earlier acts in the reduction process by means of the shoes, and to .perform by means of the rolls a series offinal steps for which the shoes might not be so perfectly adapted.

There may be as many of the shoes and rolls,

relatively and-in the aggregate, as experiencemay dictate. In the drawings I show the mill as fitted with three shoes and three rolls, serving for a process of six steps. In practice, however, I have been in the habit of involving more shoes than rolls, one roll being arranged with four shoes, and also two rolls with four shoes.

It is obvious that while the gradual-reduction process could be executed by means of shoes to the exclusion of outer rolls, as arranged in-my previous patent herein referred to,the rolls are also capable of serving in my mill to the exclusion of shoes. The grain may be first fed to the outer roll, corrugated and adjusted for the splitting step, and the product of this operation may be carried around successively to the. other outer rolls of the series, of which there may be as many as desired.

\ While my intention has been to produce a machine especially adapted for the gradual-re. duction process, I do not lose sight of the fact that my machine possesses the quality of being able to operate simultaneously upon different products by means of its independent outer rolls separated from each other by the partitions. In this manner the outer rolls need not act successively with reference to each other. and unless the nature of their independent products requires it they need not be of different degrees of fineness.

In the treatment of middlings, germ-middlings, and tailings my machine may be made to take the place of four or more of the ordismooth rolls differently adjust-ed. In such case none of my rolls would be corrugated.

In this manner two of my grinding-mills-One fitted entirely with smooth rolls, and the other with corrugated rolls and with or without shoeswould representtwel ve of the ordinary roller-mills, and would occupy the space of two, and at the same time I am enabled to effect a very considerable saving in power.

I claim as my invention- 1. In a grinding-mill, the combination, substantially as set forth, of a cylindrical main roll, a series of cylindrical outer rolls arranged around the main roll, partition-gussets at the outer rolls, said gussets'having one'edge contiguous to the periphery of the main roll, and one edge contiguous to the periphery of its appropriate outer roll, and an inclosing-case provided with an inlet and an outlet, and a separating-partition for each ofthe outer rolls.

2. In a grinding-mill, the combination, substantially as set forth, of a corrugated cylindrical main roll, a series of corrugated cylindrical outer rolls arranged around the main roll, partition-gussets at the outer rolls, said gussets having one edge contiguous to the periphery of the main roll, and one edge contiguous to the periphery of its appropriate outor roll, and an inclos'ing-case provided with an inlet and an outlet, and a separating-partition for each of the outer rolls.

3. In a grinding-mill, the combination, substantially asset forth, of a corrugated cylindrieal main roll, a series of cylindrical corrugated outer rolls of differing fineness of corrugation, arranged around the main roll, partition-gussets at the outer rolls, said gussets having one edge contiguous to the periphery of the main roll, and one edge contiguous to the periphery of its appropriate outer roll, and an inclosing-case provided with an inlet and an outlet, and a separating-partition for each of the outer-rolls.

at. In a grinding-mill, the combination, sub stantially as set forth, of a main corrugated roll, a series of corrugated outer rolls, a series of corrugated grinding-shoes of differing fine- 

